tiennm99andGitHub cfbac2a586 feat(canvas): 4096^2 canvas, 256-color palette (u8 byte-aligned), custom picker (#5) ...

Canvas:
- CANVAS_W/H = 4096, total 16,777,216 pixels
- BITS_PER_PIXEL = 8 (byte-aligned) — raw Redis bytes are palette indices
- Canvas-decoder becomes an identity wrap/copy
- Storage BITFIELD uses u8; offset = y*W + x
- Redis key versioned to rplace:canvas:v2 so old 32-color/2048^2 data is
  orphaned (operators can DEL the old key to reclaim memory)

Palette:
- 256 entries, generated deterministically:
  - 0..15  = 16-step grayscale ramp (pure black -> pure white)
  - 16..255 = 240 HSL wheel (4 lightness rings x 60 hues @ 82% saturation)
- nearestPaletteIndex(r,g,b) helper for custom-color snapping

UI:
- ColorPicker: 16-swatch favorites strip (grays + 8 accents) + current-color
  swatch + expand toggle for the full 16x16 grid + "Custom..." button that
  opens the native <input type="color"> and snaps to nearest palette entry
- Default selected color bumped to index 0 (black)

Tests + docs:
- canvas-decoder tests rewritten for identity u8 decode
- canvas-storage tests updated for u8 offsets
- image-to-palette tests anchored to PALETTE_BLACK=0 / PALETTE_WHITE=15 and
  COLORS_RGBA[i] probes (no more hardcoded old 32-color indices)
- integration test uses u8 BITFIELD and canvas-aware bounds
- README, system-architecture, deployment-guide updated (storage math,
  migration note for orphaned old key)

2026-04-18 13:47:01 +07:00

..

code-standards.md

refactor(rate-limit): 1 req/sec cooldown, batch up to 2048 (#3)

2026-04-18 10:19:00 +07:00

deployment-guide.md

feat(canvas): 4096^2 canvas, 256-color palette (u8 byte-aligned), custom picker (#5)

2026-04-18 13:47:01 +07:00

references.md

update references and add credits to README

2026-04-16 15:24:50 +07:00

system-architecture.md

feat(canvas): 4096^2 canvas, 256-color palette (u8 byte-aligned), custom picker (#5)

2026-04-18 13:47:01 +07:00